/* ========== 响应式断点 ========== */

/* 中屏桌面 1440px - 1919px */
@media (max-width: 1919px) {
  :root {
    --content-max-width: 1280px;
  }
}

/* 小屏桌面 1024px - 1439px */
@media (max-width: 1439px) {
  :root {
    --content-max-width: 1100px;
    --sidebar-width: 220px;
  }
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }
}

/* 平板横屏 768px - 1023px */
@media (max-width: 1023px) {
  :root {
    --header-height: 56px;
    --sidebar-width: 200px;
  }
  .container { padding: 0 var(--spacing-md); }
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .main-nav { gap: var(--spacing-md); }
  .main-nav a { padding: 6px 8px; font-size: var(--font-sm); }
  .carousel { height: 300px; }
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  .admin-layout { flex-direction: column; }
  .sidebar {
    width: 100%;
    height: auto;
    position: relative;
    top: 0;
  }
  .admin-content { padding: var(--spacing-md); }
}

/* 移动端 < 768px */
@media (max-width: 767px) {
  :root {
    --header-height: 52px;
    --font-md: 14px;
    --font-lg: 16px;
  }
  .container { padding: 0 var(--spacing-sm); }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .main-nav {
    display: none;
  }
  .main-nav.mobile-open {
    display: flex;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    flex-direction: column;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    z-index: var(--z-header);
  }
  .main-nav.mobile-open a { padding: 10px; }
  .mobile-menu-toggle {
    display: block !important;
  }
  .carousel { height: 200px; }
  .modal {
    width: 95%;
    max-height: 85vh;
  }
  .form-input, .form-textarea, .form-select {
    padding: 12px;
  }
  .btn { padding: 10px 16px; }
  .btn-lg { padding: 14px 24px; }
  .tournament-card .cover { height: 140px; }
  .toast-container {
    right: 10px;
    left: 10px;
  }
  .toast { min-width: auto; }
  .live-player-wrapper { aspect-ratio: 4 / 3; }
}

/* 移动端菜单按钮（默认隐藏） */
.mobile-menu-toggle {
  display: none;
  background: none;
  cursor: pointer;
  padding: 8px;
}
.mobile-menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 4px 0;
  transition: var(--transition-fast);
}

/* 打印样式 */
@media print {
  .site-header, .site-footer, .sidebar, .btn, .pagination {
    display: none !important;
  }
}